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3 phase to single phase

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Forum topic by Don K. posted 1921 days ago 899 views 0 times favorited 8 replies Add to Favorites Watch
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Don K.

1075 posts in 1928 days


1921 days ago

I just found a furniture company going out of business about two hours from here. They have SEVERAL Cabinet saws, ten inch jointer’s, shapers lathes, etc etc etc. All Delta, Powermatic, Jet and a few brands I am not familiar with like Lobo. The only problem is, they are all three phase. How much does it cost on average to replace a three phase 2hp to 5 hp motors with single phase 220 of the same horse power ? Example, If I bought a 10 inch powermatic jointer with a 3 phase 2 hp motor for $350, How much would a new 2 hp 220 motor cost for it ?

Anyone have a clue ? I was actually thinking of buying a few items both for my remodel business and for my shop and switching out the motors, but do not wish to have a heart attack when I go to replace the motors.

Thanks Guys.

-- Don S.E. OK


8 replies so far

View gusthehonky's profile

gusthehonky

130 posts in 2343 days


#1 posted 1921 days ago

Seems like you found a major jackpot. Power conversion an option?

-- Ciao, gth.

View Don K.'s profile

Don K.

1075 posts in 1928 days


#2 posted 1921 days ago

I thought about it, I found some converters on craigslist average price is $225 to $250. But if it was not TO expensive, I was thinking of buying more than I need (as if there ever was such a thing as to many tools,lol).
Convert them all to 220 and then resale them. Of couse LJ’s would get a BIG discount, rest would go on craigslist. But I have to let him know by tomorrow what I will take, so I am trying to see if it is worth the investment or not.

-- Don S.E. OK

View TopamaxSurvivor's profile

TopamaxSurvivor

14604 posts in 2277 days


#3 posted 1921 days ago

You can either use a rotary phase converter that looks like a motor to make 3 phase from single phase power or use a variable speed drive to feed the motor. I’m not sure off the top of my head how much to over size the drive when feeding it with single phase, at least 1/3 to 1/2. It’s not the most efficient thing in the world, but it works. Probably cheaper than replacing the motors. Check Grainger, they have everything, just make sure the motor has the same frame and speed. Good luck :-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Don K.'s profile

Don K.

1075 posts in 1928 days


#4 posted 1921 days ago

Thanks Topamax,
Forgot all about Grainger, with out knowing frame and speed…just did a generic search…OMG !!!!!! 2hp woodworking motor for a contractor saw…$400.00. So much for my get rich quick idea :(

-- Don S.E. OK

View TopamaxSurvivor's profile

TopamaxSurvivor

14604 posts in 2277 days


#5 posted 1921 days ago

I just googled and Grizzly showed up with 2 hp for about $220 and 5 hp for about $320. Not as bad as I thought they’d be :-))

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Don K.'s profile

Don K.

1075 posts in 1928 days


#6 posted 1921 days ago

No, thats not bad at all…220 I can handle. I am SERIOUSLY thinking of buying that 10 inch powermatic jointer. 350 for the jointer, lets say 250 for the motor with shipping, maybe another 100 for fixing little things….$700 for a ten inch powermatic would not be bad !!!

-- Don S.E. OK

View Julian's profile

Julian

880 posts in 2127 days


#7 posted 1921 days ago

I wouldn’t let a motor stand in my way of a good deal. Craiglist always has electric motors going up for sale. Grizzly is also good if you want a new motor.

-- Julian, Park Forest, IL

View Scott 's profile

Scott

103 posts in 1960 days


#8 posted 1920 days ago

I use a rotary phase converter in our machine shop and it will run a 7hp lathe and a small surface grinder simultaniously with no problems. If you go that route let me know and I will see what the rating is on it.

-- Scott, South Carolina

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